A lady lived in an apartment with a parrot. The only problem with the parrot (and there is ALWAYS a problem with a parrot) was that the only thing the parrot could say was "Who's that?"
One day, the lady, forgetting that she had called the plumber to fix the sink, went out to the store, leaving the parrot alone. The plumber showed up while the lady was out and knocked on the door. The parrot said "Who's that?" The plumber replied "It's the plumber"; I've come to fix the sink. The parrot said "Who's that?" The plumber replied "It's the plumber; I came to fix the sink!" The parrot said "Who's that?" The plumber yelled "It's the plumber". So, the parrot said "Who's that" The plumber screamed "IT"S THE PLUMBER !!!" So, the parrot said "Who's that?" The plumber, now very angry and very excited screamed "IT'S THE PLUMBER". Whereupon the plumber's heart gave out, and he dropped to the floor in the apartment building hallway with a giant "THUNK". When the neighbors heard the THUNK, they all ran out into the hallway, and someone looked at the body on the floor, and said "Who's that?" The parrot said "It's the plumber".
Fred